TITLE

Eliminating the audible 'buzz' in GSM phones

AUTHOR(S)
Holland, Nick; Score, Mike
PUB. DATE
July 2005
SOURCE
Portable Design;Jul2005, Vol. 11 Issue 7, p18
SOURCE TYPE
Periodical
DOC. TYPE
Article
ABSTRACT
This article focuses on eliminating the audible buzz in global system mobile phones. Cellular phone PCB are much more complex and internally noisy than ever before, due to added functionality and less board space. In many cases, the speaker is very close to the RF antenna, and the audio amplifier is closer to the RF power-amplifier section. This means that the components on the board have to deal with higher levels of RF noise than in previous generations. In many cases, this noise causes RF rectification in the audio amplifier, which results in buzzing or clicking in the speaker.
ACCESSION #
17739216

 

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